If the tank is part of the pressurized section of the system you can use a brand name "stop leak" and see if that will help. It's available at most auto parts stores. Follow the directions on the container!

If the tank is made of plastic and only holds the excess coolant in a non-presurized container you can probably go a few days and just check the radiator daily when it cold.

Rupe Wrote:If the tank is part of the pressurized section of the system you can use a brand name "stop leak" and see if that will help. It's available at most auto parts stores. Follow the directions on the container!

If the tank is made of plastic and only holds the excess coolant in a non-presurized container you can probably go a few days and just check the radiator daily when it cold.

Rupe Wrote:If the tank is part of the pressurized section of the system you can use a brand name "stop leak" and see if that will help. It's available at most auto parts stores. Follow the directions on the container!

If the tank is made of plastic and only holds the excess coolant in a non-presurized container you can probably go a few days and just check the radiator daily when it cold.

I should have mentioned the easy way for the novice to tell the difference.

The pressurized tank will have a radiator cap on it that is spring loaded in some fashion. (spring holds the pressure) A non-pressurized "holding tank" will usually have a plastic cap that is screwed on.

Rupe Wrote:I should have mentioned the easy way for the novice to tell the difference.

The pressurized tank will have a radiator cap on it that is spring loaded in some fashion. (spring holds the pressure) A non-pressurized "holding tank" will usually have a plastic cap that is screwed on.

Okay, so I have the non-pressurized type. I have to screw the cap on and it clicks as I turn it. Good to know becuase I was on my way to get the Stop Leak. I have a Jaguar S Type and the reservoir sits right in the front there is no additional jug-like coolant tank off to the side unlike my Kia which has a separate coolant reservoir apart from the radiator.

Rupe Wrote:I should have mentioned the easy way for the novice to tell the difference.

The pressurized tank will have a radiator cap on it that is spring loaded in some fashion. (spring holds the pressure) A non-pressurized "holding tank" will usually have a plastic cap that is screwed on.

Okay, so I have the non-pressurized type. I have to screw the cap on and it clicks as I turn it. Good to know becuase I was on my way to get the Stop Leak. I have a Jaguar S Type and the reservoir sits right in the front there is no additional jug-like coolant tank off to the side unlike my Kia which has a separate coolant reservoir apart from the radiator.

Thanks so much for your help.

you could also buy some jb weld and remove the reservoir and if the crack or hole isnt too big you can mix the jb weld together sread it on there let it dry and that should hold till you can properly fix the problem